====================================================== WARNING: possible circular locking dependency detected 5.15.111-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor298/4087 is trying to acquire lock: ffff0000d021d900 (&rm->m_rs_lock){....}-{2:2}, at: rds_message_purge net/rds/message.c:138 [inline] ffff0000d021d900 (&rm->m_rs_lock){....}-{2:2}, at: rds_message_put+0x138/0xa0c net/rds/message.c:180 but task is already holding lock: ffff0000cdc9cbf0 (&rs->rs_recv_lock){....}-{2:2}, at: rds_clear_recv_queue+0x40/0x23c net/rds/recv.c:761 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&rs->rs_recv_lock){....}-{2:2}: __raw_read_lock_irqsave include/linux/rwlock_api_smp.h:159 [inline] _raw_read_lock_irqsave+0x138/0x1e8 kernel/locking/spinlock.c:236 rds_wake_sk_sleep+0x34/0xc8 net/rds/af_rds.c:109 rds_send_remove_from_sock+0x1a4/0x7e0 net/rds/send.c:634 rds_send_path_drop_acked+0x394/0x3f4 net/rds/send.c:710 rds_tcp_write_space+0x1a8/0x5a4 net/rds/tcp_send.c:198 tcp_new_space net/ipv4/tcp_input.c:5443 [inline] tcp_check_space+0x128/0x774 net/ipv4/tcp_input.c:5462 tcp_data_snd_check net/ipv4/tcp_input.c:5471 [inline] tcp_rcv_established+0xac4/0x1f40 net/ipv4/tcp_input.c:5966 tcp_v4_do_rcv+0x340/0xc70 net/ipv4/tcp_ipv4.c:1726 sk_backlog_rcv include/net/sock.h:1057 [inline] __release_sock+0x1a8/0x408 net/core/sock.c:2690 release_sock+0x68/0x270 net/core/sock.c:3231 tcp_sock_set_cork+0x100/0x188 net/ipv4/tcp.c:3232 rds_tcp_xmit_path_complete+0x7c/0x8c net/rds/tcp_send.c:52 rds_send_xmit+0x19c0/0x238c net/rds/send.c:422 rds_sendmsg+0x160c/0x1bcc net/rds/send.c:1382 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] ____sys_sendmsg+0x584/0x870 net/socket.c:2412 ___sys_sendmsg+0x214/0x294 net/socket.c:2466 __sys_sendmsg net/socket.c:2495 [inline] __do_sys_sendmsg net/socket.c:2504 [inline] __se_sys_sendmsg net/socket.c:2502 [inline] __arm64_sys_sendmsg+0x1ac/0x25c net/socket.c:2502 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #0 (&rm->m_rs_lock){....}-{2:2}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3787 [inline] __lock_acquire+0x32cc/0x7620 kernel/locking/lockdep.c:5011 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5622 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xc4/0x14c kernel/locking/spinlock.c:162 rds_message_purge net/rds/message.c:138 [inline] rds_message_put+0x138/0xa0c net/rds/message.c:180 rds_loop_inc_free+0x20/0x30 net/rds/loop.c:115 rds_inc_put+0x100/0x198 net/rds/recv.c:82 rds_clear_recv_queue+0x1b0/0x23c net/rds/recv.c:767 rds_release+0xbc/0x2e4 net/rds/af_rds.c:73 __sock_release net/socket.c:649 [inline] sock_close+0xb8/0x1fc net/socket.c:1317 __fput+0x30c/0x7f0 fs/file_table.c:280 ____fput+0x20/0x30 fs/file_table.c:308 task_work_run+0x130/0x1e4 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0x688/0x2134 kernel/exit.c:872 do_group_exit+0x110/0x268 kernel/exit.c:994 get_signal+0x634/0x1550 kernel/signal.c:2889 do_signal arch/arm64/kernel/signal.c:890 [inline] do_notify_resume+0x3d0/0x32b8 arch/arm64/kernel/signal.c:943 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:597 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&rs->rs_recv_lock); lock(&rm->m_rs_lock); lock(&rs->rs_recv_lock); lock(&rm->m_rs_lock); *** DEADLOCK *** 2 locks held by syz-executor298/4087: #0: ffff0000e033d610 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #0: ffff0000e033d610 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: __sock_release net/socket.c:648 [inline] #0: ffff0000e033d610 (&sb->s_type->i_mutex_key#11){+.+.}-{3:3}, at: sock_close+0x80/0x1fc net/socket.c:1317 #1: ffff0000cdc9cbf0 (&rs->rs_recv_lock){....}-{2:2}, at: rds_clear_recv_queue+0x40/0x23c net/rds/recv.c:761 stack backtrace: CPU: 1 PID: 4087 Comm: syz-executor298 Not tainted 5.15.111-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2011 check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3787 [inline] __lock_acquire+0x32cc/0x7620 kernel/locking/lockdep.c:5011 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5622 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xc4/0x14c kernel/locking/spinlock.c:162 rds_message_purge net/rds/message.c:138 [inline] rds_message_put+0x138/0xa0c net/rds/message.c:180 rds_loop_inc_free+0x20/0x30 net/rds/loop.c:115 rds_inc_put+0x100/0x198 net/rds/recv.c:82 rds_clear_recv_queue+0x1b0/0x23c net/rds/recv.c:767 rds_release+0xbc/0x2e4 net/rds/af_rds.c:73 __sock_release net/socket.c:649 [inline] sock_close+0xb8/0x1fc net/socket.c:1317 __fput+0x30c/0x7f0 fs/file_table.c:280 ____fput+0x20/0x30 fs/file_table.c:308 task_work_run+0x130/0x1e4 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0x688/0x2134 kernel/exit.c:872 do_group_exit+0x110/0x268 kernel/exit.c:994 get_signal+0x634/0x1550 kernel/signal.c:2889 do_signal arch/arm64/kernel/signal.c:890 [inline] do_notify_resume+0x3d0/0x32b8 arch/arm64/kernel/signal.c:943 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline] el0_svc+0xfc/0x1f0 arch/arm64/kernel/entry-common.c:597 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584